Piezometer connection



Oct. Z2. 1940. M. M. BoRDEN PIEZOMETER CONNECTION Filed laren 9,' 195s Patented Oct. 22, 1940 v.JzI-YFEIS STATES PA'TI-1151T- IOFF'iCl.

PIEZOMIETER CONNECTION .Moro yM. Borden, Philadelphia, Ta., v.ass'ignor to Simplex Valve and Meter Company, Philadelphia, Pa., a corporation of Delaware YApplication March 9,

5 Claims.

This inventionrelates to piezometers, land more particularly to a piezometer construction and arrangement-especially Vadapted for use with sewage lines'and the'like. v

A-n important object of the invention is to provide means, preferably controllable from a'distance, through-Which'the piezometer can Vbe periodically cleaned'since piezometers usedwlth sewage vlin'es are often clogged bythe dirt and greases contained in the lineand, accordingly, provide a faulty response .at 'the meter with which they are connected. 'The collection of `dirt and grease at the piezometer mouth .occurs not only Iin the mouth of the piezometer ibut' likewise upon the surface of the tube about the 4mouth of the piezometer, and for this reason a further purpose of theinvention isthe provision Yin aconstruction ofthis character of an .arrangement whereby the inner surface of the conduit about the piezometer may be cleansed. n Y

A further .object `of the invention is the provision Aof means whereby the dirt .and grease from the conduit may be held against entrance into fthe Ymeter connection proper.

.A -still further object of the invention is the provision in a construction of this charactenof an :arrangement whereby the piezometer may be very readilyrernoved and cleaned.

These and other objects 4I attain bythe construction shown in the accompanying drawing wherein, for the purpose of illustration I have shown apreferredfembodiment of my invention and wherein:

Fig..1 is'afsectional '.view through asewage conrduithaving a piezometer vand cleaning means .therefor in accordance with my invention;

Fig. 2 is an enlarged detail sectional View through a piezometer constructed in accordance 40 Withmy invention; .and

Fig. 3 is an end elevation of the piezometer proper.

Referring now more particularly to the drawing, the numeral I designates a conduit for sewage or the like, and II, a casing secured to the conduit about an opening I2 formed therein. The casing I I comprises inner and outer sections I3 and I4, the inner section consisting of a valve casing the valve I5 of which, when in its seated position, divides the inner section into inner and outer chambers I 6 and I'I. The outer end of the outer section I4 of the casing is formed with a packing gland I8 through which is slidably directed a tube I9. The inner end of this tube ts Within the opening I2 and has its inner terminus 1938,'Se1'ial N0. 194,974

(Cl. 7S-211) 4flush with :the inner surface of the .conduit wall, `and is held. against `rotation as by means of a key 20 or the like. This inner end of the tube is bushed as at 2I, the 'bushing likewise having its inner end flush with the inner surface of.' .the conduit wall and having rotatable therein a scraper 2'2vat present-shown as comprising a pluralityo-f-radial sections. These sections are carried by a shaft Y23 extending through a packing box '24 at the outer end of tube I9 and at the exterior the `shafftfis equipped lwith a worm gear 25. This worm gear is driven from motor 25 through 4gearing. 21, lshaft 28, gearing 29 and shaft 3Il bearing `a worm for lcoaction therewith. Motor 26 'may be controlled Mfrom any suitable point.

The vcasing AI'I has a `larger internal diameter than tube I Q, and'clean water may be introduced to the spacebetween the tube .and casing through a conduit .3I.. 'Under ordinary .circumstances the rate at which .water is introduced to the conduit 3l need only'be suiiicient to cause a slight flow into the main .conduit Ill, .the water .entering the interior of v.tube I9 through `openings 3,2. When it is desired .toiiush the system, the ow .through 4conduit 3.I may beincreased to the desired extent.

,It has been noted, .asfabove suggested, that `there isa tendency ^.to formation .of a ridge about the .edge .of a ,piezometer upon the surface of the main yconduit WalL-andto insure against and to assist. in removing -`this `collection I provide flushing itubes 33 which extend through the conduit .wall ladjacentthe opening :I2 .and yhave slots 34 directing-,fluidfentering through the `iushing tubes across-.the 'mout-h of vthe piezometer. To further .assist zin .removal of any such collection, SI lprovide Aat:thetnuposite side .of .the conduit I0 avcasing :35 including a :packing gland 236 guiding .-a `rod .31. This-rod has :at itsinnerend-a scraper 38 at present shown as of the squeegee type having flexible plates 39 which may spread against the wall of the tube about the piezometer and scrape any foreign material therefrom. The rod 3l is equipped with any suitable means for shifting the same diametrically of the conduit and for rotating the same after it arrives at its cleaning position, such means being at present sho-wn as a hand-wheel 40.

A meter connection to the piezometer may be made at any point in the wall of the casing inwardly of packing gland I8. Preferably, however, this connection is made at the inner chamber of the inner section of the casing, as illustrated at 11|, in order that the meter connection may not be disturbed when Valve I5 is closed.

It will be obvious that at any time that the piezometer is in need of cleaning this may be accomplished by placing motor 26 in operation and supplying a ushing flow through the conduit 3l and flushing tubes 33. If the use of the flushing tubes proves insuiiicient at any time to prevent collection about the mouth of the piezometer, this collection may be removed by scraper 38.

Should the tube or scraper at any time require repair, this may be readily accomplished by withdrawing the tube and scraper through the valve which in part forms the inner casing section and closing the valve, following which the outer casing section may be removed for any necessary repairs without interrupting operation of the meter.

Since the construction illustrated is, obviously, capable of considerable modification Without departing from the spirit of my invention, I do not wish to be understood as limiting myself thereto except as hereinafter claimed.

I claim:

1. In combination with a conduit for the flow 0f sewage or the like, a piezometer communicating therewith and having its inner end vflush with the inner wall of the conduit, a scraper rotatable in and normally disposed in the inner end of the piezometer, said piezometer comprising a tube slidably engaged in an opening in the conduit Wall, a casing surrounding the inner end of the tube having at its outer end a packing gland through which the outer end of the tube extends and having its inner end in sealing engagement with the conduit wall, a valve for segregating the inner end of the casing from the remainder thereof, a packing gland at the outer end of the tube, and means including a shaft extending through the packing gland of the tube and engaged with said scraper to operate the same.

2. In combination with a conduit for the flow of sewage or the like, a piezometer communicating therewith and having its inner end flush with the inner wall of the conduit, a scraper rotatable in and normally disposed in the inner end of the piezometer, meansy to direct clean water through the piezometer to the conduit, said piezometer comprising a tube slidably engaged in an opening in the conduit Wall, a casing surrounding the inner end of the tube having at its outer end a paclng gland through which the outer end of the tube extends and having its inner end in sealing engagement with the conduit Wall, a valve for segregating the inner end of the casing from the remainder thereof, a packing gland at the outer end of the tube, and means including a shaft extending through the packing gland of the tube and engaged with said scraper to operate the same.

3. In combination with a conduit for the flow of sewage or the like, a piezometer communicating therewith and having its inner end flush with the inner wall of the conduit, a scraper rotatable in. the inner end of the piezometer, means to direct a flushing current of clean water over the inner surface of the conduit about the inner end of the piezometer, said piezometer comprising a tube slidably engaged in an opening in the conduit wall, a casing surrounding the inner end of the tube having at its outer end a packing gland through which the-outer end of the tube extends and having its inner end in sealing engagement with the conduit wall, a valve for segregating the inner end of the casing from the remainder thereof, a packing gland at the outer end of the tube, and means including a shaft extending through the packing gland of the tube and engaged with said scraper to operate the same.

4.- In combination with a conduit for the flow of sewage or the like, a piezometer communicating therewith and having its inner end flush with the inner wall of the conduit, a scraper rotatable in the inner end of the piezometer, means to direct clean Water-.through the piezometer to the conduit, means to direct a ushing current of clean water over the inner surface of the conduit about ,the-inner end of the piezometer, said piezometer comprising a tube slidably engaged in an opening in the conduit wall, a casing surrounding the `inner end of the tube having at its outer end a packing gland through which the outer end of the tube extends and having its inner end in sealing engagement with the conduit wall, a valve for segregating the inner end of the casing from the remainder thereof, a packing gland at theouter end of the tube, and means including a shaft extending through the packing gland of the tube and engaged with said scraper to operate the same.

5. In combination with a, conduit for the flow of sewage or the like, a. piezometer communicating therewith and having its inner end flush with the inner wall of the conduit, means to direct a flushing current of clean water over the inner surface of the conduit about the inner end MORO M. BORDEN. 

